{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-56700: Grav - Multiple Remote Code Execution Vulnerabilities via Unsafe Unserialize and Command Injection","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-56700","status":"final","version":"1","initial_release_date":"2026-06-30T22:08:40.943Z","current_release_date":"2026-06-30T22:08:40.943Z","revision_history":[{"date":"2026-06-30T22:08:40.943Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Grav CMS before 2.0.0-beta.2 contains multiple code-execution vulnerabilities. Three unsafe unserialize() calls - in Scheduler\\JobQueue, Framework\\Cache\\Adapter\\FileCache, and Session - deserialize untrusted data without restricting allowed classes, enabling PHP object injection and, via a gadget chain, arbitrary code execution where an attacker controls the serialized input. Additionally, InstallCommand's git clone operation passes the branch, url, and path parameters into a shell command without escaping, allowing OS command injection via plugin/theme installation (which requires admin access). A Twig security blocklist bypass (server-side template injection) is also present. The issues are fixed in 2.0.0-beta.2.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-56700 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-56700"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-56700"},{"category":"external","summary":"GitHub Security Advisory (GHSA-vj3m-2g9h-vm4p)","url":"https://github.com/getgrav/grav/security/advisories/GHSA-vj3m-2g9h-vm4p"},{"category":"external","summary":"VulnCheck Advisory: Grav - Multiple Remote Code Execution Vulnerabilities via Unsafe Unserialize and Command Injection","url":"https://www.vulncheck.com/advisories/grav-multiple-remote-code-execution-vulnerabilities-via-unsafe-unserialize-and-command-injection"}]},"product_tree":{"branches":[{"category":"vendor","name":"Grav","branches":[{"category":"product_name","name":"Grav","branches":[{"category":"product_version_range","name":"<2.0.0-beta.2","product":{"name":"Grav Grav <2.0.0-beta.2","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:grav:grav:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"2.0.0-beta.2","product":{"name":"Grav Grav 2.0.0-beta.2","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:grav:grav:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-56700","title":"Grav - Multiple Remote Code Execution Vulnerabilities via Unsafe Unserialize and Command Injection","notes":[{"category":"description","text":"Grav CMS before 2.0.0-beta.2 contains multiple code-execution vulnerabilities. Three unsafe unserialize() calls - in Scheduler\\JobQueue, Framework\\Cache\\Adapter\\FileCache, and Session - deserialize untrusted data without restricting allowed classes, enabling PHP object injection and, via a gadget chain, arbitrary code execution where an attacker controls the serialized input. Additionally, InstallCommand's git clone operation passes the branch, url, and path parameters into a shell command without escaping, allowing OS command injection via plugin/theme installation (which requires admin access). A Twig security blocklist bypass (server-side template injection) is also present. The issues are fixed in 2.0.0-beta.2.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"],"fixed":["CSAFPID-2"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":9.3,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 2.0.0-beta.2.","product_ids":["CSAFPID-1"]}]}]}